CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY - USD ($)	Class A Common Stock Common Stock	Additional paid-in capital	Retained earnings	Treasury stock	Accumulated other comprehensive loss	Total
Balance at Dec. 31, 2020	$ 4,428,000	$ 14,144,000	$ 33,756,000	$ (10,213,000)	$ (577,000)	$ 41,538,000
Balance (in shares) at Dec. 31, 2020	4,428,000
Treasury stock (in shares) at Dec. 31, 2020				(1,273,000)
Increase (Decrease) in Stockholders' Equity
Net (loss) income	$ 0	0	1,383,000	$ 0	0	1,383,000
Restricted common stock compensation	$ 25,000	10,000	0	0	0	35,000
Restricted common stock compensation (in shares)	25,000
Stock-based compensation	$ 0	4,000	0	0	0	4,000
Foreign currency translation adjustment	0	0	0	$ 0	(42,000)	(42,000)
Treasury stock (in shares) at Sep. 30, 2021				(1,273,000)
Balance at Sep. 30, 2021	$ 4,453,000	14,158,000	35,139,000	$ (10,213,000)	(619,000)	42,918,000
Balance (in shares) at Sep. 30, 2021	4,453,000
Balance at Jun. 30, 2021	$ 4,453,000	14,149,000	35,872,000	$ (10,213,000)	(558,000)	43,703,000
Balance (in shares) at Jun. 30, 2021	4,453,000
Treasury stock (in shares) at Jun. 30, 2021				(1,273,000)
Increase (Decrease) in Stockholders' Equity
Net (loss) income	$ 0	0	(733,000)	$ 0	0	(733,000)
Restricted common stock compensation	$ 0	8,000	0	0	0	8,000
Restricted common stock compensation (in shares)	0
Stock-based compensation	$ 0	1,000	0	0	0	1,000
Foreign currency translation adjustment	0	0	0	$ 0	(61,000)	(61,000)
Treasury stock (in shares) at Sep. 30, 2021				(1,273,000)
Balance at Sep. 30, 2021	$ 4,453,000	14,158,000	35,139,000	$ (10,213,000)	(619,000)	42,918,000
Balance (in shares) at Sep. 30, 2021	4,453,000
Balance at Dec. 31, 2021	$ 4,453,000	14,167,000	36,046,000	$ (10,213,000)	(613,000)	43,840,000
Balance (in shares) at Dec. 31, 2021	4,453,000
Treasury stock (in shares) at Dec. 31, 2021				(1,273,000)
Increase (Decrease) in Stockholders' Equity
Net (loss) income	$ 0	0	(876,000)	$ 0	0	(876,000)
Exercise of stock options	$ 7,000	33,000	0	0	0	$ 40,000
Exercise of stock options (in shares)	7,000					41,809
Restricted common stock compensation	$ 7,000	29,000	0	0	0	$ 36,000
Restricted common stock compensation (in shares)	7,000
Stock-based compensation	$ 0	1,000	0	0	0	1,000
Dividends	0	0	(160,000)	0	0	(160,000)
Foreign currency translation adjustment	0	0	0	$ 0	(356,000)	(356,000)
Treasury stock (in shares) at Sep. 30, 2022				(1,273,000)
Balance at Sep. 30, 2022	$ 4,467,000	14,230,000	35,010,000	$ (10,213,000)	(969,000)	42,525,000
Balance (in shares) at Sep. 30, 2022	4,467,000
Balance at Jun. 30, 2022	$ 4,467,000	14,214,000	35,407,000	$ (10,213,000)	(809,000)	43,066,000
Balance (in shares) at Jun. 30, 2022	4,467,000
Treasury stock (in shares) at Jun. 30, 2022				(1,273,000)
Increase (Decrease) in Stockholders' Equity
Net (loss) income	$ 0	0	(237,000)	$ 0	0	(237,000)
Restricted common stock compensation	$ 0	16,000	0	0	0	16,000
Restricted common stock compensation (in shares)	0
Stock-based compensation	$ 0	0	0	0	0
Dividends	0	0	(160,000)	0	0	(160,000)
Foreign currency translation adjustment	0	0	0	$ 0	(160,000)	(160,000)
Treasury stock (in shares) at Sep. 30, 2022				(1,273,000)
Balance at Sep. 30, 2022	$ 4,467,000	$ 14,230,000	$ 35,010,000	$ (10,213,000)	$ (969,000)	$ 42,525,000
Balance (in shares) at Sep. 30, 2022	4,467,000